Nozzle for oil burners



Aug 14, 1934- .1. B. HAWLEY, JR 1,970,138

NOZZLE FOR OIL BURNERS Filed ADE.. 31, 1931 fvgl Patented ug. 1,4, 11934UNITED S Pisa NOZZLE FOR OIL BURNERS apolis, Minn.

Application August 3l, 1931, Serial No. 560,367

4 Claims.

This invention relates to a nozzle, and while the nozzle may havevarious applications, it particularly is designed as a nozzle for usewith an oil burner. With most of the oil burners now on the 5 market,the oil is supplied under pressure and is discharged into the combustionchamber in the form of a iine spray delivered from a spraying oratomizing nozzle. 'Such nozzles commonly comprise a shell adapted to becoupled to the oil supply line, in which is disposed some form of screenor strainer, a distributing means, and a discharge member having a verysmall discharge aperture. It has been quite customary to have thisdischarge aperture in a cap threaded onto one end of said shell. It isdesirable in such a nozzle, to have a construction which is easilyassembled and disassembled and since one end, commonly called the rearend of the nozzle, is secured to the oil supply line, it is desirable tohave the parts of the nozzle accessible and removable from the front endof the nozzle so that they can be taken out without disconnecting thenozzle. As the oil used in oil burners is not a highly rened oil andcontains more or less grit, after the oil passes through the nozzle forsome time, it wears and enlarges the small discharge aperture. It isdesirable, therefore, to have this discharge aperture formed in a membermade of very hard metal, and it is also desirable to have a dischargeaperture made in a member which can be easily, quickly and cheaplyreplaced.

It is an object of this invention, therefore, to provide a nozzle for anoil burner or other use, of simple and compact form, the parts of whichare easily accessible and removable.

It is another object of the invention to provide a nozzle for an oilburner or other use, comprising a shell having a chamber therein, astraining device or screen in said chamber, a distributing meansdisposed in said shell, a cap having an open end threaded on said shelland a discharge disk engaged by said cap, all of said parts being heldin place by said cap and being removable from the front of said shell bythe removal of said cap.

1t is another object of the invention to provide a nozzle for an oilburner or other use, comprising a shell threaded at one end to receive acoupling and threaded at its other end to receive a cap, said shellhaving a bore at said latter end and a chamber therein of smallerdiameter than said bore,

thus forming an offset or shoulder, a screen disposed in said chamberand having a head secured thereto fitting in said offset, a distributingdisk tting in said bore and engaging said head, said disk having spacedholes therethrough communieating with an annular groove at the outerside of said disk, a discharge disk engaging said distributine disk andhaving a shallow annular groove alining with the annular groove therein,and having a central small discharge orice to 50 which shallow grooveslead from said annular groove.

lt is still another object oi the invention to provide a nozzle having ashell, a cap threaded thereon, together with a distributing disk ofmolybdenum metal held in piace by said cap, and having a small dischargeaperture therethrough.

These and other objects and advantages of the invention will be fullyset forth in the following description made in connection with theaccompanying drawing, in which like reference characters refer tosimilar parts throughout the several views and in which:-

Fig. l is a central longitudinal section through the assembled nozzle;

Fig. 2 is an end view of the coupling member shown;

Fig. 3 is an end view of the nozzle as seen from the left end with thecoupling member removed;

Fig. 4 is an end View of the screen member used;

Fig. 5 is an end View or face view of the distributing means used;

Fig. 6 is a section taken on line 6 6 of Fig. 5;

Fig. 7 is a face View of the discharge washer used as seen from theinner side thereof; and

Fig. 8 is an end view of the cap used as seen from the outer sidethereof;

Fig. 9 is a View in side elevation partly in vertical section, showing amodification.

Referring to the drawing, a nozzle is shown comprising the shell l0.While this nozzle may be variously formed, in the embodiment of theinvention illustrated it is shown as having a cylindrical centralportion with a portion 10c of hexagonal form at the rear thereof, therear end being slightly beveled. Sai shell has a central chamber 10btherein shown as of cylindrical form and a flared tapped portion 10cextends rearwardly therefrom. A coupling member l1 is shown having atapered threaded end llc adapted to be screwed into the portion loc ofthe shell 10. Said coupling has a central hexagonal portion 1lb and athreaded cylindrical portion llc to the rear thereof, said couplinghaving a plain cylindrical portion 11d to the rear of the portion llcand having a beveled or tapered end lle. Said plug has a bore 111 oicylindrical form extending therethrough. The shell 10 is exteriorlythreaded at its front end as shown at 10d and has a cylindrical bore 10eat this end of larger 110 diameter than the chamber 10b so that ashoulder or offset 10j is formed therein. A strainer member or screen 12is provided, having its rear end closed and having its front end iittedover the rear end of a head 13, said screen being held thereon by a ring14 pressed over said screen about the exterior or said head 13 andscreen 12 is thus very tightly secured to the head 13. Said head 13 hasa portion substantially tting in the chamber 1Gb and has an enlargedcylindrical portion 13a fitting in the bore 10c and against the seat10j. Head 13 has a central opening 13b and at its iront has a shallowrecess therein surrounded by a comparatively shallow flange 13o. Adistributing disk 15 is provided, of a diameter to it snugly in bore10e, and this disk engages the front of the head 13. Disk 15 has a pairof spaced holes 15a extending therethrough, and as shown, these holespreferably are formed at opposite sides of said disk. Disk 15 also hasan annular groove 15b at its front side with which holes 15acommunicate. A discharge disk 16 is provided, said disk having a shallowannular groove 16a at its inner side shown as of substantially the samediameter as the groove 15b and said disk has a small central dischargeaperture 16h. While the shape of the aperture 1619 may be varied, in theembodiment of the invention illustrated it is shown as slightly aring atits outer side and having a somewhat larger flare or conical shape atits inner side. A pair of shallow grooves 16e extend from the groove 16aat the inner side of the disk 16 to the daring portion of the aperture1Gb, these grooves extending tangentially tothe discharge aperture 1Gbas shown in Fig. 7. Disk 16 should be made of very hard material andwhile in practice it has been found that molybdeniun metal or molybdenumsteel is suitable for this member, a special alloy known as nitralloy,is used. A cap member 17 is provided, which is of hexagonal shape asshown in Fig. 8 and internally bored and threaded to screw onto thethreaded portion 10d. Cap 1'7 has an opening 17a in its front surroundedby an inwardly extending flange, the inner side of which engages theouter side of the disk 16 and holds this disk together with disk 15 andthe head 13 in place.

In operation, oil is supplied under pressure from the oil line tocoupling 11 and is delivered into the chamber of shell 10. This oil isstrained by passing through the screen member 12. This screen member hasa large surface and thus a large capacty for eiciently straining theoil. The oil passes through the interior of the screen member throughthe opening 13b in member 13 and to the shallow recess in the front ofmember 13. From here the oil passes through the holes 15a to the groove15b, thence to groove 16a through the shallow or small grooves 16o tothe aperture 16h and is projected therefrom in finely divided condition.

If it is desired to inspect the nozzle or to remove or replace any ofthe parts, the cap member 17 can be removed and the disks 15 and 16 canthen be at once removed as can also the strainer member 12 with its head13. The head 13 is threaded at 13b so that an instrument can be threadedtherein and head 13 and screen 12 then pulled outwardly. The parts areapt to be more or less tightly stuck into place after the burner hasbeen operating for a considerable period. These parts can then bereadily inspected, cleaned or replaced without disconnecting the nozzlefrom the supply line.Y The disk 16 being very hard, the aperture 1Gbdoes not. wear rapidly to a larger size. If it is ever necessary toreplace the disk 16, it is an easy matter and a matter of small expense.

In Fig. 9 a modified form of shell is shown, indicated as 20. Thecentral portion and front end of shell 20 are exactly the same as shell10 already described. Shell 20 also has the hexagonal portion 20asimilar to the portion 10al of shell 10. Instead, however, of having theshell interiorly threaded and a separate connecting nipple such as 11,the shell 20 is provided with the coupling projection 20h exteriorlythreaded at 20c to receive the coupling. The bore 20e of the shell iscontinued through to the rear end and the rear end is beveled as shownat 20d. This projection 20d corresponds to the rear end of member 11 andis threaded to receive a standard coupling.

From the above description it will be seen that applicant has provided avery simple and ellicient nozzle and one in which the parts are easilyaccessible and removable from the front end thereof. While the nozzle isthus convenient of access, it is at the same time capable of being verycheaply made. The parts are all of simple construction, as is shell 10and are easily and inexpensively manufactured. As stated, the screen 12has a large area and is very eiective as a strainer Without beingquickly clogged up. The structure is very compact and all of the partsare securely held in place. The nozzle has been amply demonstrated inactual practice and found to be very successful and efficient.

It will, of course, be understood that various changes may be made inthe form, details, arrangement and proportions of the parts, withoutdeparting from the scope of applicants invention, which generallystated, consists in a device capable of carrying out the objects aboveset forth, in the parts and combinations of parts disclosed and definedin the appended claims.

What is claimed isz- 1. A nozzle having in combination, a shellexteriorly threaded at one end, a cap arranged on the threaded portionof said shell, said shell having a chamber therein providing a shoulderat the side of said chamber opposite said cap, a head for supporting ascreen and tting the chamber of said shell against said shoulder, saidhead including a central opening leading from said screen to saidchamber, a distributing disk tted in said shell and against said head,said distributing disk extending outwardly beyond the end of said shelladjacent said cap, a discharge disk withl out said shell and fittedagainst said distributing disk, said distribution disk providingcommunication between said head and said discharge disk, said dischargedisk having an outlet aperture, and said cap threaded on said shellhaving an open front and including a portion engaging said dischargedisk positively to clamp said head and disks between the shoulder ofsaid shell and said cap under a pressure predetermined by the extent towhich said cap is turned down on said shell.'

2. A nozzle having in combination, a shell eX- teriorly threaded at oneend, a cap arranged on the threaded portion of said shell, said shellhaving a chamber therein providing a shoulder at the side of saidchamber opposite said cap, a head for supporting a screen and fittingthe chamber of said shell against said shoulder, said head including acentral opening leading from said screen and having a continuous flangeportion opposite said screen providing a concavity for fluid adjacentsaid opening, a distributing disk fitted in said shell and against saidiiange portion, said distributing disk extending outwardly beyond theend or said shell adjacent said cap, a discharge disk without said shelland tted against said distributing disk and spaced from the end of saidshell, said distributing disk providing communication between saidconcavity and said discharge disk, and said discharge disk having anoutlet aperture, and said cap threaded on said shell having an openfront and including a portion engaging said discharge disk to clamp saidhead and disks against each other and between the shoulder of said shelland said cap under a pressure predetermined by the extent to which saidcap is turned down on said shell.

3. A nozzle having in combination, a shell exteriorly threaded at oneend, a cap arranged on the threaded portion of said shell, said shellhaving a chamber therein providing a shoulder at the side of saidchamber opposite said cap, a head for supporting a screen and fittingthe chamber of said shell against said shoulder, said head including anopening leading from said screen to said chamber, a distributing disktted in said shell and against said head, said distributing diskextending outwardly beyond the end of said shell adjacent said cap, adischarge disk without said shell, tted against said distributing diskand spaced from the end of said shell, said distributing disk providingcommunication between said head and said discharge disk, said dischargedisk having an outlet aperture, said cap threaded on said shell havingan open front and including a portion engaging said discharge disk Vtoclamp said head and disks between the shoulder of said shell and saidcap under a pressure predetermined by the extent to which said cap isturned down on said shell, and said discharge disk having the marginalportion thereof snugly tted to the internal surface of said cap.

4. A nozzle for spraying oil having in combination, a shell exteriorlythreaded at one end to receive a cap, said shell having a chambertherein with an enlarged bore adjacent its front end forming a shoulder,a cylindrical screen disposed in said chamber carried by a hollow membertting against said shoulder, a distributing disk at the end of andengaging said member, a discharge disk engaging said last mentioned diskand spaced from the end of said shell, and a cap threaded on said shellhaving an open front end and constructed and arranged to engage saiddischarge disk and hold the same against said distributing disk andtight against said member carrying said screen.

JOHN B. HAWLEY, JR.

